Filter-press.



3 SHEETS-SHEET 1.

PATENTED AUG. 6, 1907.

L. S. SGHUENFELD.

I llll APPLIUATION FILED JULY 27. 1906.

l?. 45 LB WWWWIWF @agee 9337 L ure c@ 5. BY a, rfhozrsFeld PATENTED AUG. 6, 1907.

L. S. SGHOENFELD.

FILTER PRESS.

APrLIoATIoN Hum 3111.227. 190e.

3 SHEETS-SHEET 2.

j INVENTOR. Luferfce wATfORA/EY choerseld No. 862,286. I PATENTED AUG. 6, 1907.

L. s. SGHOENFBLD.

PILTERPRESS.

APPLICATION FILED JULY 27, 1906. f

3 SHEETS-SHEET 3.

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WITNESSE'S: y INVENTOR.

ATTORNEY.

LAURENCE S. SCHOENFELD, OF JAMESTOWN, COLORADO.

FILTER-PRESS.

Specicaton of Letters Patent.

Patented Aug'. 6, 1907.

Application filed July 27.1906. Serial No. 328,038.

To all 'whom it 'may concern:

Be it known that I, LAURENCE S. SCHOENFELD, a citizen of the United States of America, residing at Jamestown, in the county of Boulder and State of Colorado, have invented certain new and useful Improvements in Filter-Presses, of which the following is a specification.

My invention relates to the class of devices commonly known as filter-pressesand which are employed either to separate theliquid from the solid matter contained in a mixture, to wash solids by permeation of suitable. liquids or to defecate liquids by forcing them through a cleansing medium.

The object of my invention is to provide a device of the class named which being simple in construction, may be produced at low cost, is easily operated, and rapidly and efficiently performs the functions for which it is intended.

Myl invention furthermore contemplates the provision of a filtering press, which obviating extension or separation of its parts to discharge the solid residuum, may be operated on a minimum of 'loor space, and which by reason of the simplicity of its construction i and action, saves time', labor and expense of installation and operation.

I attain these objects by the mechanism illustrated in the accompanying drawings in the various views of which Alike parts are similarly designated and in which Figure 1 represents a central, horizontal section through the device, Fig. 2 a central, vertical section taken along a line 2 2, Fig. 1, Fig. 3- a plan View drawn to a reduced scale, Fig. 4- an enlarged face view of one of the Vfiltering frames or plates employed in my construction, Fig. 5 a vertical cross section taken along a line 5 5, Fig. 4, Fig. 6 a similar section through one of the' two end plates employed in my press, Fig. 7 a vertical cross section along a line 7 7, Fig. 2, Fig. 8- an end view of the press, Fig. 9 a section along a line 9 9, Fig. 2, looking towards the press and Fig. 10- a vertical section along a line 10 10, Fig. 2, looking in the direction of the arrow.

Referring to the drawings 5 designatesa preferably rectangular box, comprising the normally vertical sides 6 and the therewith integral ends 7 and provided at its upper side with a detachable lid or cover 8 and at its opposite or underside with a hinged door 9, the con-- struction and operation of which will hereinafter be described.

The interior of the receptacle is divided into a pluwithin the box, are held inopposite guide ways 12 in Y,

the inner surfaces or'` the sides 6 and normally in con tiguousrelation to the lid 8 and the-,bottom door 9.

separates the two sections 17 and 1,8. .partments formed between theopposite downwardly The Wedge shaped partition 11, constituting the filtering fra-mes o1' plates as they are commonly called in the art to which this invention pertains, are hollow, while their downwardly converging sides 13 are provided with a plurality of elongated ports or slots 14, through which the liquid contained in the solution passes from the compartments 10 into the interior of the plates. The exterior surfaces of the apcrtured sides ol' frans-s 11 are bounded-by marginal ribs Al5 and divided by :t transverse rib 16, into two sections 17 and 18, the upper one of which exceeds the lower one in area, while the total area of the openings in each section is substuu tially equal to that in the other.

- In practice when the filtering frames are in operai ive position in box 5, they are enveloped in or covered by filter cloth 19, composed of duck or other suitable fabric.

as illustrated in Figs. 4, 5, 6 and 7 This cloth being stretched across the outer surface of thueonvorging sides 13 engages ribs 15 and 16 and thus effectively compensates for the uneven permeability of the cakes l by equalizing the amount of water passing through the vertically largest part of the compartment extending above ribs 16, and the shallower but wider portion extending below the same.

The filter plates employed in the device are of uniform shape and size with the exception of the two end ones, the non-apertured outer surface of each of which extends at right angles to its upper and lower sides and is, in practice, perpendicular to engage the inner surface of the adjacent ends 7 of case 5.

' To avoid confusion, in the drawings, the filter cloth has been omitted in Figs. 1 and 2.

The lid orcover 8 'is secured to the box by means of al plurality of bolts 2O which extending through corrospondingly disposed, outwardly projecting lugs 21 and 22 respectively on the lid and the adjacent portieri o the box, provide an impervious connection. The bottom plate or door 9, which normally closes the underside of the box and which, in practice, is employed to discharge the cakes of solid matter from the chambers 10, is hinged along the lower edge of one of the sides of the receptacle 5, by means of a pin 23 projecting through alined apertures in the knuckles 24 and-25'disposed alternately alongl one of the edges of The eomthe door and the adjacent sideof the box. Plate 9 is furthermore provided with a plurality of axially alined bearings 26, which support a shaft 27, disposed in parallel relation to the hinged edge of the door. The openings 28 in the bearings are oblong to permit vertical displacement of the shaft.

The extremities 27 of shaft 27, which extend beyond the edges of the doel' project, when the latter is in the closing position, through diametrically corresponding apertures 29 in the lower ends of vertically disposed hangers 30, fulcrumed in proximity to the upper edges of the box in brackets 3l which, project laterally from the end plates 7. The lower extremities of hangers 30, below apertures 29, curve outwardly to facilitate the :uiunuutic insertion of the tapering shaft ends, while their opposite or upper extremities, extending above the upper surface of cover 8, are connected with a double crank 32, by means of rods 33. Crank 32 is pivotally mounted on lid 8 by means of vertically. extending pin 34 and is provided with a hand rod 35 which extends laterally beyond the edge of the cover. The double' toggle-joint thus produced, permits the operator to draw the upper extremities of the hangers together and in consequence, disengage their opposite ends from the shaft 27, when it is desired to open door 9.

llelical springs- 36, disposed above the fulcrum between the hangers and the ends of case 5, tend to retain the former in their normal or perpendicular position.

gage gear wheels 4() mounted in contiguous position on A plurality of eccentric cams 37 on shaft 27 are adapted to engage the outer surface of plate 9 and thereby force the latter against the lower edges of the sides and ends of box 5, when the shaft supported by hangers 3() and vertically movable inbearings 26, is rotated..

The leverage required to thus clamp the door by rota-v tion of the shaft, is provided by means of a second shaft 38 mounted in alined apertures 39, in bearings 2G, in parallel relation to the cam shaft-and having pinions 40 in proximity to its extremities, which enshaft 27. The outer extremities of shaft 38, which extend beyond the edges of the box, are squared for the appliance of a crank, wrench or other suitable lever.

To assure a water tight joint between the door and the box, the vertical sides of the latter are chisel-edged and in practice, engage an elastic gasket 4l, embedded in a recess formed for the purpose in the inner surface of the door.

The. closing of the door is materially facilitated by a counter poise. 42, adjustably held on an arm 43, which extends in oblique direction from the hinged vedge of the door. i

From the foregoing description, the operation of 'opening and closing the bottom plate 9 will be readily understood.

When it is desired to 'dischargeihe contents of chambers l0, the operator, as heretofore explained, disengages the ends of shaft, 27, from the hangers and thus causes the door to turn about its hinges by reversing the ,position of hand rod 35.l To re-close the door, it is raised until the pointed extremities of shaft 27 which, engaging the outwardly curving,r lower ends of hangers 30, cause them to move outwardly, have entered the apertures 29', when the springs 36 return the hangers to 'the perpendicular position, and the door -is supported asbefore. ily rotating shafts38 and 27 the cams are subsequently brought to engage the surface of the door 'and the latter is pressed against the V-shaped edges of the vertical sides of the box as-heretoforedescribed.

The solution to be treated is forced vinto the press by means of a valve-controlled-feed pipe 44 extending vparallelly to the side of the box and which connects with the compartments 10 by means of branch pipes 45. The filtrate entering the cavities in the filter plates is expelled through valve-controlled discharge pipes or outlets 46 which communicate with apertures inthelowermost portion of plates ll.

The process of washing the cakes of solid matter. 'formed' in the compartments, is performed by means of a conduit 47 which connects with the interior of the filter plates near the top by means of valve-controlled branch pipes 48. The filter plates are divided into` two series, the respective members oi which alternate andwhi'ch are known as the low-pressure and highpressure plates. Thus, in the construction shown in the drawings, the first, third, fifth, etc., plates are the low-pressure plates, while the alternate, second, fourth, etc., members are the high-pressure plates.v The valves 46 and 48, communicating with the interiorv of the plates comprised in each series are respectively connected by means of rods 49 and 50, so that the outlets and inlets of each series'may be simultaneously opened or closed independent from thosein the other. The device is furthermore provided with a series of outlet pipes 51, the cocks of which are connected 'by a rod 52 and which, extending through the cover 8, communicate with the uppermost part of the cavities in the liigl1pressi1re plate. To prevent leakage at the juncture of the apertured plates andthe ends of the inand outlet pipes, the latter may be surrounded by gaskets 53, which to this end, are embedded in recesses in the inner surface of the sides 6 and the cover 8.

Having thus described the mechanical construction of my improved filter press, its operation is as follows The cloth covered filter plates having been placed in position inthe guide ways 12, cover 8 is securely fastened by means of bolts 20 and the bottom plate or door 9 tightened against the lower edges of the receptacle by rotation oflshaft 38 as heretofore described.

The valves in pipes 48 of the two series of'plates are now closed, those in the outlet pipes 46 opened and the solution forced into the compartments l0 through pipes 44 and 45, by atmospheric or mechanical pressure. By reason of the continued compression of the solution, the liquid is forced through the filteringcloth into the interior ofthe filterplates, while the residuurn or solid matter contained in the solution collects in the spaces between the plates, from where it is subsequently discharged in thel forro of cakes.'v The filtrate, entering the cavities of the filter plates, is'at -once discharged through the open 'outlet pipes andthevfeedng of the solution into pipe 44 is continued untilcessation of the n flow of filtrate indicates that the compartments areA filled. The valves in pipes 46, leading into the highpressure plates (designated H in the drawings) are now closed, while those inthe alternate or low-pressure plates, L, are left open and the cocks in the water feed pipes 48, vconnnunicating withy the high-pressure plates are opened vpreceding the processof'washing the cakes in chambers l0. The wash water employed to this end, is forced through 'pipe 47 until the interior oi the high-pressure plates is completely filled, which is indicated by an efilux of water through the pipes 5l in the top of the device. These outlets are subsequently closed and the Washing process continued, to

force the wash Water from the high-pressure plates through the cakes vcontained in chambers l0 into the low-pressure plates to be emitted through pipes 46. This concludes the process of separating the liquids from the solids contained in the solution and the cocks in the water feed pipes 48 and the discharge pipes 4G are now opened in both the high-pressure and low-pressure series of plates and water forced into pipe 47 lor the purpose of freeing the residuunr from the cloth and washing the latterprior to the .discharge of the cakes. This final action is accomplished by opening the bottom plate or door 9 and permitting the cakes to drop out of the compartments into a subjacent chute or other receptacle. v

The methods practiced by means of rnyimprovcd filter press, tovwash solids with liquids or to clarify liquid by forcing tlrcm through a purifying agent contained in the compartments, being in principle the same as the above described process oi separating liquids from solids, are obvious and further explanation is, in consequence;omitted.

I wish it furtherunderstood that variations in details of construction oriy arrangement of the various parts of the apparatus as described, may be availed of within the principle of my invention.

What I claim is 1. ln a filter press. a series of perforated hollow filter' members. spaced in unchanged relation to each other during the entire cyle of operations, means to feed matter info the intermediate "spaces, means to discharge fluids from the inter'ior' of the members and means for discharging the residue from the spaces.

2. In a filter press, a series of per'toraftrul, hollow filter members spaced in unchanged relation to each lother' during the en'tlrc cycle of operations, means to feed matter info the intermediate spaces, means of discharge 'from the lnter'ior of the said members, and means to feed fluid thereinto.

3. In a filtei' press. a. series of filter members spaced in constantly fixed relation to each other, means to feed matter independently into each intermediate space, and means to discharge the contents of all the spaces simultaneously without altering the relative position of the said members.

-l. ln a filter' press, n series of filter members spaced in unchanged relation to each other duringr flee entire cycle ot' operations, means to feed matter info fhe intermediate spaces, and means to l'eed and discharge flrrid into and i'rom each member.

5. ln a filter' press, a series of filler members spaced in unchanged relation to each other during.r the entire cycle ol' operations. means to feed matter into the intermediate spaces, and means to simultaneously l'eed and discharge flrrid into and from each series of alternate members.

o. lu a filter press, a series 0f filter members spaced ln unchanged relation to each other durini,r the entire cycle of operations. means to feed matter into the intermediate spaces. means to feed and discharge fluid into and from the interior o1' the member's and means to cause emission of' surplus flrrid therefrom.

T. A filter' press; comprising in combination, a casing. a plurality Aof` filter members dividing its inferior into aseries of' individually inclosed compartments. means to [eed uralter' thereinto. and means on the said casing to discharge the contents thereof without changing the relalive position of the said members.

s. A filter press comprising in combination. n casing, a plurality of filiernrembers having.r downwardly converging sides, dividing its interior into arserles of compartments,

means to feed matter therelnto, and meansito discharge the contents thereof.

9. A filter' press comprising in combination, a casing, a plurality of filter members dividing its interior into a series of compartments, and having downwardly converging -sides divided into equally perforated, separated sections of unequal area. means to feed matter' into the compartments, and means to discharge the contents thereof.

10. filter' press comprising iu combination, a casingfa plurality of filter members dividing its interior into a ser'ies of compartments, and having downwardly converging sides divided into equally perforated inwalled sections of unequal arca, filters engaging the said walls and spaced lr-onr the, surface ot' the sides. means to feed matter' into the compartments, and means' to discharge the contents thereof.

l1. A filter press comprisingr in combination, a casing, a

pluraliry oi' hollow filler' members dividing its interior' into' a series of compartments. means to feed matter' thereinto; n'reans to dlsclmrge the contents thereof'. the said casing being provided with inlets and outlets for' fluid, communicating willi the interior of' the members.

12. A filter' press comprising in combination, a casing,l a plurality ot' filter members dividing its interior into a scries of' compartments. means to feed matter thereinto, nreans to discharge the contents thereof. valve-controlled inlets and outlets for fluid in the said casing, eommuriieating with the interior of the members. means to simultaneously operate the valves on the inlets or' on the outlet-s communicating with each series of alternate members, and valve controlled outlets communicating with the uppermost portion ofthe members.

lil. A filter press comprising in combination, a casing, a plurality of filter' members dividing its interior into a series ot compartments. a hinged lid on the said casing, means to automatically secure the iid in its closed position, and means to force it against. the adjacent edges of the casing.

`1l. A filter' press comprising in combination, a casing, a plurality of filter' Imembers dividing its interior into a series of cempar'tments. a hinged lid on the said casing, a shaft rotatably mounted on the lid to lie laterally movable. cams on the said shaft adapted to engage the lid, hangers lulcrumed on the casing. and arranged to support the extremities of the shaft, and means to disconnect the hangers from the shaft.

15. A filter' press comprising in combination, a casing, a

plurality of filter' members dividing its interior into a series of compartments, a fringed lid on the said casing. hangers fulcrurned 'on the said casing, and adapted to automatically engage projections on the said lid to vsecure it in ifs closed position, and means to disconnect the hangers from the said projections.

iff. A filter' press comprising iu combination, a casing` a plurality of fltermember's dividing its interior into a series of' compartments, n hinged -iid on the said casing, a shaft rotatably nronnted on the lid, cams on the said shaft, hangers fulcrumcd on the casing and adapted to support the extremities or" the shaft, and a shaft rotatably mounted on the lid in geared connection with the cam shaft.

17. A filter' press comprising in combination, n casing, u. plurality of filter members dividing its interior into a series of compartments. a fringed lid on the said casing, a shaft rotatably mounted on the lid, cams on the said shaft, hangers fuir-ruined on the casing and adapted to support the shat'l af their lower 'extremities and a toggle appliance connecting their' opposite extremities.

is. A filter press comprising ln combination, a casing, a plurality ot' filter members dividing its interior' into a Series ot cmnlnrrtmcnts. a fringed lid on the caslng, a shaft rotatably mounted on the lid. cams on the said shaft, hangers fulcrumed on the casing and adapted to support the shnlf at one oli their extremities, and means to converge their opposite ends.

in teslimonywhereof l have affixed my signature in presence of two witnesses.

LAURENCE. S. SUHOENFFLD.

duress-es:

(l. J. RoLLANm-rr,

li. 3i. Hausnr. 

